Hostname: page-component-5c6d5d7d68-xq9c7 Total loading time: 0 Render date: 2024-08-22T23:40:06.675Z Has data issue: false hasContentIssue false
  • English
  • Français

Uraninite-albite veins from the Mistamisk Valley of the Labrador Trough, Quebec

Published online by Cambridge University Press:  05 July 2018

L. Kish  and
M. Cuney
L. Kish
Affiliation:
Ministère de l'Energie et des Ressources, 1620 boul. de l'Entente, Quebec G1S 4N6, Canada
M. Cuney
Affiliation:
Centre de Recherches sur la Géologe de l'Uranium, B.P. 23, 54500 Vandoeuvre lès Nancy, France
Get access Rights & Permissions [Opens in a new window]

Abstract

The uraninite-albite veins of the Mistamisk area occur in the argillite member of the Dunphy Formation, which is near the base of the slightly meta-morphosed Lower Proterozoic sequence of the central Labrador Trough. The vein minerals are albite, uraninite, dolomite, and chlorite, and minor quantities of quartz, tellurides, sulphides, gold, and organic material. Pitchblende and calcite are related to late remobilization.

The veins were deposited in fractures by hydrothermal solutions, and metasomatism caused albitization of wall rocks. Fluid inclusions have an unusual composition, described here for the first time in connection with soda-metasomatism; the aqueous solution of the inclusions is oversaturated in NaCl and contains Ca2+ and Mg2+, and the gas phase mostly consists of N2, CO and CO2. The presence of hematite and absence of hydrocarbons indicates that the vein-forming solution was oxidizing.

The temperature and pressure of vein formation, estimated from fluid inclusion data, was 300°–350° and 2.5 kbar respectively consistent with the composition of the phengite which is a common metamorphic mineral of the host rock. Vein emplacement occurred in the waning stages of the Hudsonian Orogeny, the hydrothermal solution possibly originating by metamorphism of sodic schists of the Mistamisk area, which are possibly of evaporitic origin.

Type
Research Article
Information
Mineralogical Magazine , Volume 44 , Issue 336 , December 1981 , pp. 471 - 483
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1981

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

*

And Centre de Recherches P6trographiques et Géochimiques C.O. no. 1, 54500 Vandoeuvre lès Nancy, France.

References

Cathelineau, M., Cuney, M., Leroy, J., Lhote, F., Nguyen, T. C., Pagel, M., and Poty, B. (1979). Proc. symp. on uranium vein deposits, Lisbonne, to be published.Google Scholar
Coveney, R. M. and Kelly, W. C. (1971). Contrib. Mineral. Petrol. 32, 32-42.CrossRefGoogle Scholar
Dhamelincourt, P., Beny, J. M., Dubessy, J., and Poty, B. (1979). Bull. Mineral. 102, 60010.Google Scholar
Dimroth, E. (1978). Labrador Trough Area. Ministrre des Richesses Naturelles du Qurbec. Geol. Report 193.Google Scholar
Dimroth, E. and Dressier, B. (1978). In Metamorphism in the Canadian Shield. Geol. Surv. Can. Paper 78-10.Google Scholar
Guilhaumou, N., Dhamelincourt, P., Touray, J. C., and Barbillat, J. (1978). C.R. Acad. Sci. Paris, 287, 317-19.Google Scholar
Helgeson, H. C. (1969). Am. J. Sci. 267, 729-804.CrossRefGoogle Scholar
Hey, M. H. (1954). Mineral. Mag. 30, 30-92.Google Scholar
Hilbert, R. (1979). Chemicingenium Band 2, Hochschulverlag, Freiburg, 212 pp.Google Scholar
Holland, H. D. and Malinin, S. D. (1979). In Geochemistry ofHydrothermal ore deposits, 2nd ed., Barnes, H. L. (ed.), New York, 461-508.Google Scholar
Keevil, N. B. (1942). J. Am. Chem. Soc. 64, 64-50.CrossRefGoogle Scholar
Kish, L. and Tremblay-Clark, P. (1978). Rapport préliminaire des travaux de 1976. Ministère des Richesses NatureUes du Québec, Québec. D.P. V-567.Google Scholar
Kish, L. and Tremblay-Clark, P. (1979). Rapport préliminaire des travaux de 1977 et 1978. Ministère des Richesses Naturelles du Québec, Québec. D.P. V-666.Google Scholar
Kochenov, A. V., Korolev, K. G., Dubinchuk, V. T., and Medvedev, Yu. L. (1977). Geochem. Int. No. 14, 14-7.Google Scholar
Legret, M. (1979). Unpublished thesis CRPG-ENSG, Nancy, France.Google Scholar
Luzhnaya, N. P. and Vereshtchetina, I. P. (1946). Zh. Pr. Khim. 19, 19-33.Google Scholar
Nguyen Trung, C. (1980). XXVIe Congrés Géologique International, Paris, to be published.Google Scholar
Pagel, M. and Ruhlman, F. (1979). Bull. Mineral. 102, 654-64.Google Scholar
Poty, B., Leroy, J., and Jachimovicz, L. (1976). Bull. Soc. fr. Mineral. Cristallogr. 89, 89-6.Google Scholar
Rich, R. A., Holland, H. D., and Petersen, U. (1977). Hydrothermal uranium deposits, Elsevier, New York, 264 pp.Google Scholar
Roedder, E. (1972). In Data of Geochemistry, U.S.G.S. Prof. pap. 440-JJ, 164 pp.Google Scholar
Swannenberg, H. E. C. (1980). Ph.D. thesis, Ryksuniversität, Utrecht, 147 pp.Google Scholar
Touray, J. C. (1970). Schweiz. Mineral. Petrogr. Mitt. 50, 50-79.Google Scholar
Velde, B. (1965). Am. J. Sci. 262, 886-913.CrossRefGoogle Scholar
Wanless, R. K., Stevens, R. D., Lachance, G. R., and Edmonds, C. M. (1968). Age determinations and geological studies, K-Ar isotopic ages. Report 8; Geol. Surv. Can., Paper 67-2, pt. A.CrossRefGoogle Scholar